Synthesis of nanostructured FePt systems

Abstract

The paper compares some characteristics of nanoparticles of the FePt system obtained by the method of joint reduction of solutions of metal precursors using different reducing agents: an alkaline solution of hydrazine hydrate and sodium tetrahydroborate. The method of transmission electron microscopy is used to analyze the shape and morphology of the obtained nanosized particles, according to the data obtained by the methods of X-ray diffraction, phase analysis is carried out and the main X-ray structural parameters are evaluated. Thermal analysis in combination with mass spectrometry is used to characterize the state and purity of the surface of nanoparticles. It is shown in the work that nanoscale FePt systems obtained using the reductants selected in the work have similar physicochemical characteristics.

Synthesis and study of some physicochemical features of Co-Pt nanostructured system

“…The obtained powders were washed with water and isopropyl alcohol and dried in vacuum. More details of the technique of obtaining samples are presented in [17] on the example of synthesis of the related Fe-Pt system. Samples with the Co:Pt ratio of 11:89, 26:74, 31:69, 62:38, 77:23, which covers almost all phase regions corresponding to the known phase diagram of the Co-Pt system, i.e., SS, ordered phases of intermetallides with L12 and L10 structures, and two-phase regions, were obtained.…”